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Example code of gkcaptcha/gkcaptcha-laravel

Informations about the package gkcaptcha-laravel

gkcaptcha-laravel

Laravel integration package for gkCAPTCHA. Provides a service provider, middleware, validation rule, Blade directive, and Facade for CAPTCHA protection with a single line of configuration.

Requirements

Installation

The package auto-discovers via Laravel's package auto-discovery. No manual registration required.

Configuration

Publish the config file:

Add to .env:

Environment Variables

Variable Default Description
GKCAPTCHA_SECRET_KEY (required) Server-side secret key for token verification
GKCAPTCHA_SITE_KEY (required) Public site key for the widget
GKCAPTCHA_API_URL https://gkcaptcha.gatekeeper.sa gkCAPTCHA API base URL
GKCAPTCHA_TIMEOUT 5.0 Request timeout in seconds
GKCAPTCHA_FAIL_CLOSED false Block requests on network error (fail-closed)
GKCAPTCHA_WIDGET_URL https://gkcaptcha.gatekeeper.sa/widget/gk-captcha.js Widget script URL

Blade Directive

Add the CAPTCHA widget to any Blade template:

If GKCAPTCHA_SITE_KEY is set in .env, you can omit the argument:

The directive outputs:

Middleware

Route Group (recommended)

Protect a group of routes by adding VerifyCaptcha to a route group:

Global Kernel Registration (Laravel 10)

In app/Http/Kernel.php:

Then use the alias:

Token Sources

The middleware reads the CAPTCHA token from (in priority order):

  1. captchaToken body field (form POST or JSON body)
  2. X-Captcha-Token request header (AJAX / API)

Middleware Responses

Condition HTTP Status Body
No token present 403 {"success": false, "error": "CAPTCHA token required"}
Token invalid 403 {"success": false, "error": "CAPTCHA verification failed"}
Network error (fail-open) passes through Warning logged, request continues
Token valid passes through Normal route response

Validation Rule

Use the gkcaptcha rule in form request classes or inline validators:

Or with the Rule object directly:

Facade

For inline verification anywhere in your application:

Fail-Open Behavior

By default (GKCAPTCHA_FAIL_CLOSED=false), network errors when reaching the gkCAPTCHA API allow the request to proceed. A warning is logged:

This prevents gkCAPTCHA API availability from causing downtime on your application.

Set GKCAPTCHA_FAIL_CLOSED=true to block requests when the API is unreachable. This is appropriate for high-security environments where it is better to reject users than to risk allowing bots through.

Testing

The package includes PHPUnit-compatible tests using Orchestra Testbench.

With dependencies installed:

For environments without Composer (CI, Docker images without Testbench), a standalone runner is included:

License

MIT

All versions of gkcaptcha-laravel with dependencies

PHP Build Version
Package Version
Requires php Version >=8.1
gkcaptcha/gkcaptcha-php Version ^0.1
illuminate/support Version ^10.0|^11.0
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